Subtract 40/7 from 20/54
1st number: 20/54, 2nd number: 5 5/7
20/54 - 40/7 is -1010/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
20/54 = 20 × 7/54 × 7 = 140/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
40/7 = 40 × 54/7 × 54 = 2160/378 - Subtract the two like fractions:
140/378 - 2160/378 = 140 - 2160/378 = -2020/378 - After reducing the fraction, the answer is -1010/189
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